Abstract
We develop gradient schemes for the approximation of the Perona-Malik equations and nonlinear tensor-diffusion equations. We prove the convergence of these methods to the weak solutions of the corresponding nonlinear PDEs. A particular gradient scheme on rectangular meshes is then studied numerically with respect to experimental order of convergence which shows its second order accuracy. We present also numerical experiments related to image filtering by time-delayed Perona-Malik and tensor diffusion equations.
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The research of A. Handlovičová, K. Mikula and O. Stašová has been supported by grants APVV-0184-10, VEGA 1/1063/11 and VEGA 1/1137/12.
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Eymard, R., Handlovičová, A., Herbin, R. et al. Applications of approximate gradient schemes for nonlinear parabolic equations. Appl Math 60, 135–156 (2015). https://doi.org/10.1007/s10492-015-0088-4
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DOI: https://doi.org/10.1007/s10492-015-0088-4